java language stack overflow

[W6BJK]

I get the message:
Exception in thread "Thread-583" java.lang.StackOverflowError
followed by a long list of other messages while trying to
compile an Arduino sketch. The problem appears to be
my attempt to define a 4 by n table.

const byte Set2a[][4] = {
  {0   ,0   ,0   ,UNUSED},        // 00 unused
.......
  {0xF7,0   ,0   ,FUNKEY}         // 83 Function key F7
}; 

Attempting to interface a PS/2 keyboard to an adduino.

[ffissore]

Which version of the IDE are you using? 1.5.x series has a couple of fixes related to this problem. Can you share the entire sketch code?

[W6BJK]

I was using IDE version 1.0.5. This morning I downloaded and installed version 1.5.6-r2 and the problem still occurs.
Error message:
Exception in thread "Thread-354" java.lang.StackOverflowError
at java.util.regex.Pattern$GroupHead.match(Unknown Source)
........... (long list of similar massages)
Below is the entire sketch.
The problem appears to be the size of the table I am defining.
If I move the start of the comment block one line up (reducing the table size by one row)
the sketch compiles without error.
A table driven approach to decoding the PS/2 keyboard scan codes seemed like the
easiest and I was just starting to construct the table when the problem appeared.

/*
         Interface a PS/2 type keyboard from Parallax
*/

#include <stdio.h>
/*
         Define PS/2 keyboard input-output pins
*/
#define CLOCK 11     // keyboard clock pin
#define DATA 10      // keyboard data pin
/*
         PS/2 Keyboard Scan Codes, Set 2

         Column 1 (Set2[n][0])    Unshifted ascii char or special function index
         Column 2 (Set2[n][1])    Shifted ascii char
         Column 3 (Set2[n][2])    index for 0xE0 prefix function kays
         Column 4 (Set2[n][3])    scancode decoding type

         Notes: Function keys F1 thru F12 return values 0xF1 thru 0xFC for now. Let applications handle.
                TAB key returns a tab code (0x09) shifted or unshifted, some keyboards show a backward tab,
                    don't know how to handle that yet.  Make shifted a global boolean so applications can
                    respond as they wish to shifted TAB key.
                Split table 4 x n table inti two 2 x n tables because of stack overflow in compiler.
*/
#define UNUSED 0
#define ASCII 1                   // Keys that respond to CAPS LOCK
#define FUNKEY 2
#define CONTRL 3
#define KEYPAD 4
#define TOPROW 5                  // Keys that do not respond to CAPS LOCK
const byte Set2[][4] = {
  {0   ,0   ,0   ,UNUSED},        // 00 unused
  {0xF9,0   ,0   ,FUNKEY},        // 01 Function key F9
  {0   ,0   ,0   ,UNUSED},        // 02 unused
  {0xF5,0   ,0   ,FUNKEY},        // 03 Function key F5
  {0xF3,0   ,0   ,FUNKEY},        // 04 Function kay F3
  {0xF1,0   ,0   ,FUNKEY},        // 05 Function key F1
  {0xF2,0   ,0   ,FUNKEY},        // 06 Function key F2
  {0xFC,0   ,0   ,FUNKEY},        // 07 Function key F12
  {0   ,0   ,0   ,UNUSED},        // 08 unused
  {0xFA,0   ,0   ,FUNKEY},        // 09 Function key F10
  {0xF8,0   ,0   ,FUNKEY},        // 0A Function key F8
  {0xF6,0   ,0   ,FUNKEY},        // 0B Function key F6
  {0xF4,0   ,0   ,FUNKEY},        // 0C Function key F4
  {'\t','\t',0   ,ASCII },        // 0D Tab key
  {'`' ,'~' ,0   ,TOPROW},        // 0E apostrophe/tilde
  {0   ,0   ,0   ,UNUSED},        // 0F unused
  {0   ,0   ,0   ,UNUSED},        // 10 unused
  {1   ,0   ,0   ,CONTRL},        // 11 Left ALT key
  {2   ,0   ,0   ,CONTRL},        // 12 Left SHFT key
  {0   ,0   ,0   ,UNUSED},        // 13 unused
  {3   ,0   ,0   ,CONTRL},        // 14 Left CTRL key
  {'q' ,'Q' ,0   ,ASCII },        // 15 Letter Q
  {'1' ,'!' ,0   ,TOPROW},        // 16 Digit 1 / Exclamation mark
  {0   ,0   ,0   ,UNUSED},        // 17 unused
  {0   ,0   ,0   ,UNUSED},        // 18 unused
  {0   ,0   ,0   ,UNUSED},        // 19 unused
  {'z' ,'Z' ,0   ,ASCII },        // 1A Letter Z
  {'s' ,'S' ,0   ,ASCII },        // 1B Letter S
  {'a' ,'A' ,0   ,ASCII },        // 1C Letter A
  {'w' ,'W' ,0   ,ASCII },        // 1D Letter W
  {'2' ,'@' ,0   ,TOPROW},        // 1E Digit 2 / At symbol
  {0   ,0   ,0   ,UNUSED},        // 1F unused
  {0   ,0   ,0   ,UNUSED},        // 20 unused
  {'c' ,'C' ,0   ,ASCII },        // 21 Letter C
  {'x' ,'X' ,0   ,ASCII },        // 22 Letter X
  {'d' ,'D' ,0   ,ASCII },        // 23 Letter D
  {'e' ,'E' ,0   ,ASCII },        // 24 Letter E
  {'4' ,'$' ,0   ,TOPROW},        // 25 Digit 4 / Dollar sign
  {'3' ,'#' ,0   ,TOPROW},        // 26 Digit 3 / Tic tac toe
  {0   ,0   ,0   ,UNUSED},        // 27 unused
  {0   ,0   ,0   ,UNUSED},        // 28 unused
  {' ' ,' ' ,0   ,ASCII },        // 29 Space bar
  {'v' ,'V' ,0   ,ASCII },        // 2A Letter V
  {'f' ,'F' ,0   ,ASCII },        // 2B Letter F
  {'t' ,'T' ,0   ,ASCII },        // 2C Letter T
  {'r' ,'R' ,0   ,ASCII },        // 2D Letter R
  {'5' ,'%' ,0   ,TOPROW},        // 2E Digit 5 / Percent symbol
  {0   ,0   ,0   ,UNUSED},        // 2F unused
  {0   ,0   ,0   ,UNUSED},        // 30 unused
  {'n' ,'N' ,0   ,ASCII },        // 31 Letter N
  {'b' ,'B' ,0   ,ASCII },        // 32 Letter B
  {'h' ,'H' ,0   ,ASCII },        // 33 Letter H
  {'g' ,'G' ,0   ,ASCII },        // 34 Letter G
  {'y' ,'Y' ,0   ,ASCII },        // 35 Letter Y
  {'6' ,'^' ,0   ,TOPROW},        // 36 Digit 6 / Caret
  {0   ,0   ,0   ,UNUSED},        // 37 unused
  {0   ,0   ,0   ,UNUSED},        // 38 unused
  {0   ,0   ,0   ,UNUSED},        // 39 unused
  {'m' ,'M' ,0   ,ASCII },        // 3A Letter M
  {'j' ,'J' ,0   ,ASCII },        // 3B Letter J
  {'u' ,'U' ,0   ,ASCII },        // 3C Letter U
  {'7' ,'&' ,0   ,TOPROW},        // 3D Digit 7 / Ampersand
  {'8' ,'*' ,0   ,TOPROW},        // 3E Digit 8 / Asterisk
  {0   ,0   ,0   ,UNUSED},        // 3F unused
  {0   ,0   ,0   ,UNUSED},        // 40 unused
  {',' ,'<' ,0   ,TOPROW},        // 41 Comma / Left caret
  {'k' ,'K' ,0   ,ASCII },        // 42 Letter K
  {'i' ,'I' ,0   ,ASCII },        // 43 Letter I
  {'o' ,'O' ,0   ,ASCII },        // 44 Letter O
  {'0' ,')' ,0   ,TOPROW},        // 45 Digit zero / Right bracket
  {'9' ,'(' ,0   ,TOPROW},        // 46 Digit 9 / Left bracket
  {0   ,0   ,0   ,UNUSED},        // 47 unused
  {0   ,0   ,0   ,UNUSED},        // 48 unused
  {'.' ,'>' ,0   ,TOPROW},        // 49 Period / Right caret
  {'/' ,'\?',0   ,TOPROW},        // 4A Forward Slash / Question mark
  {'l' ,'L' ,0   ,ASCII },        // 4B Letter L
  {';' ,':' ,0   ,TOPROW},        // 4C Semicolon / Colon
  {'p' ,'P' ,0   ,ASCII },        // 4D Letter P
  {'-' ,'_' ,0   ,TOPROW},        // 4E Dash (Minus sign) / Underscore
  {0   ,0   ,0   ,UNUSED},        // 4F unused
  {0   ,0   ,0   ,UNUSED},        // 50 unused
  {0   ,0   ,0   ,UNUSED},        // 51 unused
  {'\'','\"',0   ,TOPROW},        // 52 Single quote / Double quote
/*  {0   ,0   ,0   ,UNUSED},        // 53 unused
  {'[' ,'{' ,0   ,TOPROW},        // 54 Left square Bracket / Left brace
  {'=' ,'+' ,0   ,TOPROW},        // 55 Equal sign / Plus sign
  {0   ,0   ,0   ,UNUSED},        // 56 unused
  {0   ,0   ,0   ,UNUSED},        // 57 unused
  {4   ,0   ,0   ,CONTRL},        // 58 Caps Lock
  {5   ,0   ,0   ,CONTRL},        // 59 Right SHFT key
  {'\r','\r',0   ,TOPROW},        // 5A ENTER (Return) key
  {']' ,'}' ,0   ,TOPROW},        // 5B Right square Bracket / Right brace
  {0   ,0   ,0   ,UNUSED},        // 5C unused
  {'\\',0   ,0   ,ASCII },        // 5D Back Slash
  {0   ,0   ,0   ,UNUSED},        // 5E unused
  {0   ,0   ,0   ,UNUSED},        // 5F unused
  {0   ,0   ,0   ,UNUSED},        // 60 unused
  {0   ,0   ,0   ,UNUSED},        // 61 unused
  {0   ,0   ,0   ,UNUSED},        // 62 unused
  {0   ,0   ,0   ,UNUSED},        // 63 unused
  {0   ,0   ,0   ,UNUSED},        // 64 unused
  {0   ,0   ,0   ,UNUSED},        // 65 unused
  {6   ,0   ,0   ,CONTRL},        // 66 Backspace
  {0   ,0   ,0   ,UNUSED},        // 67 unused
  {0   ,0   ,0   ,UNUSED},        // 68 unused
  {'1' ,0   ,0   ,KEYPAD},        // 69 KP Digit 1
  {0   ,0   ,0   ,UNUSED},        // 6A unused
  {'4' ,0   ,0   ,KEYPAD},        // 6B KP Digit 4
  {'7' ,0   ,0   ,KEYPAD},        // 6C KP Digit 7
  {0   ,0   ,0   ,UNUSED},        // 6D unused
  {0   ,0   ,0   ,UNUSED},        // 6E unused
  {0   ,0   ,0   ,UNUSED},        // 6F unused
  {'0' ,0   ,0   ,KEYPAD},        // 70 KP Digit Zero
  {'.' ,0   ,0   ,KEYPAD},        // 71 KP Period
  {'2' ,0   ,0   ,KEYPAD},        // 72 KP Digit 2
  {'5' ,0   ,0   ,KEYPAD},        // 73 KP Digit 5
  {'6' ,0   ,0   ,KEYPAD},        // 74 KP Digit 6
  {'8' ,0   ,0   ,KEYPAD},        // 75 KP Digit 8
  {6   ,0   ,0   ,CONTRL},        // 76 ESC key
  {7   ,0   ,0   ,CONTRL},        // 77 NUM Lock key
  {0xFB,0   ,0   ,FUNKEY},        // 78 Function key F11
  {'+' ,0   ,0   ,KEYPAD},        // 79 KP + key
  {'3' ,0   ,0   ,KEYPAD},        // 7A KP Digit 3
  {'-' ,0   ,0   ,KEYPAD},        // 7B KP Dash (Minus) key
  {'*' ,0   ,0   ,KEYPAD},        // 7C KP * key
  {'9' ,0   ,0   ,KEYPAD},        // 7D KP Digit 9
  {8   ,0   ,0   ,CONTRL},        // 7E SCROLL LOCK key
  {0   ,0   ,0   ,UNUSED},        // 7F unused
  {0   ,0   ,0   ,UNUSED},        // 80 unused
  {0   ,0   ,0   ,UNUSED},        // 81 unused
  {0   ,0   ,0   ,UNUSED},        // 82 unused
*/  {0xF7,0   ,0   ,FUNKEY}         // 83 Function key F7
}; 
int i, j;
byte parityError, framingError;
void setup() {
  Serial.begin(9600);
  pinMode(CLOCK, INPUT);
  pinMode(DATA, INPUT);
//  delay(1000);       // wait 1 second for keyboard to reset
}
void loop() {
  Serial.println(KBRead(), HEX);
}
/*
        routine to read a byte from keyboard
*/
byte KBRead(void) {
  int i;
  byte clockState, dataState;
  byte startBit, data, parity, parityBit, stopBit;
  parityError = false;
  framingError = false;
  pinMode(CLOCK, INPUT);
  pinMode(DATA, INPUT);
  do clockState = digitalRead(CLOCK);  while (clockState == HIGH); // wait for falling edge
  delayMicroseconds(5);
  startBit = digitalRead(DATA);
  if (startBit == HIGH) framingError = true;
  do clockState = digitalRead(CLOCK);  while (clockState == LOW); // wait for rising edge
  delayMicroseconds(5);
  data = 0;
  parity = 0;
  for (i = 0; i < 8; i++) {
    do clockState = digitalRead(CLOCK);  while (clockState == HIGH); // wait for falling edge
    delayMicroseconds(5);
    dataState = digitalRead(DATA);
    data = data >> 1;
    if (dataState == HIGH) {
      data = data | 0x80;
      parity = parity ^ 1;
    }
    do clockState = digitalRead(CLOCK);  while (clockState == LOW); // wait for rising edge
    delayMicroseconds(5);
  }
  do clockState = digitalRead(CLOCK);  while (clockState == HIGH); // wait for falling edge
  delayMicroseconds(5);
  parityBit = digitalRead(DATA);
  if ((parityBit == HIGH) && (parity == 1)) parityError = true;
  if ((parityBit == LOW) && (parity == 0)) parityError = true;
  do clockState = digitalRead(CLOCK);  while (clockState == LOW); // wait for rising edge
  delayMicroseconds(5);
  do clockState = digitalRead(CLOCK);  while (clockState == HIGH); // wait for falling edge
  delayMicroseconds(5);
  stopBit = digitalRead(DATA);
  if (stopBit == LOW) framingError = true;
  do clockState = digitalRead(CLOCK);  while (clockState == LOW); // wait for rising edge
  delayMicroseconds(5);
  return(data);
}

[ffissore]

I know it's strange, but (with IDE 1.5.x) if you format the code (tools -> autoformat), it will successfully compile, even if you remove the comment, thus having a 131 items in the table
/cc @cmaglie

[W6BJK]

Wow, that's weird. That worked. Thank you for the help.

[ffissore]

I'll keep the issue open, since it needs to fixed anyway

[ffissore]

Please give a try to the IDEs linked at the bottom of this email on the dev list
https://groups.google.com/a/arduino.cc/forum/#!msg/developers/4X2T3rCxXWM/YNJl6PZuDucJ
We're testing a new preprocessor and it compiles your sketch just fine.

[ffissore]

New preprocessor tracked at #2636. Builds for testing it are available